Lasioglossum (Dialictus) mesillense

• Main Authors: Gardner, Joel, Gibbs, Jason
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Hymenoptera; Halictidae; Lasioglossum; Lasioglossum mesillense; Baja; Blythe; Bonanza; Hurd; Indian; San Juan; Valles; Beaver Creek
• Online Access: https://zenodo.org/record/4337928; https://doi.org/10.5281/zenodo.4337928

Lasioglossum (Dialictus) mesillense (Cockerell, 1898) Figs 55–57, 90G, 101B, 108B Halictus nymphalis race mesillensis Cockerell, 1898b: 47 (lectotype designated herein, ♀, deposited in EMEC, examined). Halictus clarissimus Ellis, 1914b: 222 (holotype, ♀, deposited in USNM, examined) syn. nov. Halictus (Chloralictus) perexiguus Sandhouse, 1924: 26 (holotype, ♂, deposited in USNM, examined) syn. nov. Halictus mesillensis – Cockerell 1906: 429 (key). Halictus (Chloralictus) clarissimus – Sandhouse 1924: 4 (key). Halictus (Chloralictus) mesillensis – Sandhouse 1924: 4 (key). Lasioglossum (Chloralictus) clarissimum – Michener 1951: 1112 (catalog). Lasioglossum (Chloralictus) mesillense – Michener 1951: 1115 (catalog). Lasioglossum (Chloralictus) perexiguum – Michener 1951: 1116 (catalog). Dialictus clarissimus – Hurd 1979: 1965 (catalog). — Moure & Hurd 1987: 95 (catalog). Dialictus mesillensis – Hurd 1979: 1968 (catalog). — Moure & Hurd 1987: 112 (catalog). Dialictus perexiguus – Hurd 1979: 1969 (catalog). — Moure & Hurd 1987: 120 (catalog). Diagnosis Females of Lasioglossum mesillense can be recognized by the face short (length/width ratio ~0.8), frons with very fine and dense but distinctly separated punctures, clypeus with distinct apicolateral denticles, mesepisternum with dense punctures (i ≤ 1 pd) becoming crowded and weakly rugulose on the dorsal margin, T2–4 with dark spiracular spots, T1 anterior surface usually shiny, metasomal terga usually with some dense basolateral tomentum, and mesoscutum long (length/width ratio usually ±0.84). They are most similar to L. minckleyi sp. nov., L. austerum sp. nov., and L. imbriumbrae sp. nov. Females of L. minckleyi sp. nov. have the frons with crowded and indistinct punctures, mesepisternum more densely punctate ventrally (i <1 pd), T1 anterior surface coriarious, metasomal terga without tomentum, and mesoscutum broad (length/width ratio usually ≤ 0.8). Females of L. austerum sp. nov. have the head and mesosoma with more extensive dull microsculpture, ...